﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;

namespace CompanyBussiness
{
    public class ImageThumbnail : IImageThumbnail
    {
        public enum Dimensions
        {
            Width,
            Height
        }
        public enum AnchorPosition
        {
            Top,
            Center,
            Bottom,
            Left,
            Right
        }

        public virtual Image ScaleByPercent(Image imgPhoto, int Percent)
        {
            float nPercent = ((float)Percent / 100);

            int sourceWidth = imgPhoto.Width;
            int sourceHeight = imgPhoto.Height;
            int sourceX = 0;
            int sourceY = 0;

            int destX = 0;
            int destY = 0;
            int destWidth = (int)(sourceWidth * nPercent);
            int destHeight = (int)(sourceHeight * nPercent);

            Bitmap bmPhoto = new Bitmap(destWidth, destHeight, PixelFormat.Format24bppRgb);
            bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);

            Graphics grPhoto = Graphics.FromImage(bmPhoto);
            grPhoto.InterpolationMode = InterpolationMode.HighQualityBicubic;

            grPhoto.DrawImage(imgPhoto,
                new Rectangle(destX, destY, destWidth, destHeight),
                new Rectangle(sourceX, sourceY, sourceWidth, sourceHeight),
                GraphicsUnit.Pixel);

            grPhoto.Dispose();
            return bmPhoto;
        }

        public virtual Image ConstrainProportions(Image imgPhoto, int Size, Dimensions Dimension)
        {
            int sourceWidth = imgPhoto.Width;
            int sourceHeight = imgPhoto.Height;
            int sourceX = 0;
            int sourceY = 0;
            int destX = 0;
            int destY = 0;
            float nPercent = 0;

            switch (Dimension)
            {
                case Dimensions.Width:
                    nPercent = ((float)Size / (float)sourceWidth);
                    break;
                default:
                    nPercent = ((float)Size / (float)sourceHeight);
                    break;
            }

            int destWidth = (int)(sourceWidth * nPercent);
            int destHeight = (int)(sourceHeight * nPercent);

            Bitmap bmPhoto = new Bitmap(destWidth, destHeight, PixelFormat.Format24bppRgb);
            bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);

            Graphics grPhoto = Graphics.FromImage(bmPhoto);
            grPhoto.InterpolationMode = InterpolationMode.HighQualityBicubic;

            grPhoto.DrawImage(imgPhoto,
            new Rectangle(destX, destY, destWidth, destHeight),
            new Rectangle(sourceX, sourceY, sourceWidth, sourceHeight),
            GraphicsUnit.Pixel);

            grPhoto.Dispose();
            return bmPhoto;
        }

        public virtual Image FixedSize(Image imgPhoto, int Width, int Height)
        {
            int sourceWidth = imgPhoto.Width;
            int sourceHeight = imgPhoto.Height;
            int sourceX = 0;
            int sourceY = 0;
            int destX = 0;
            int destY = 0;

            float nPercent = 0;
            float nPercentW = 0;
            float nPercentH = 0;

            nPercentW = ((float)Width / (float)sourceWidth);
            nPercentH = ((float)Height / (float)sourceHeight);

            //if we have to pad the height pad both the top and the bottom
            //with the difference between the scaled height and the desired height
            if (nPercentH < nPercentW)
            {
                nPercent = nPercentH;
                destX = (int)((Width - (sourceWidth * nPercent)) / 2);
            }
            else
            {
                nPercent = nPercentW;
                destY = (int)((Height - (sourceHeight * nPercent)) / 2);
            }

            int destWidth = (int)(sourceWidth * nPercent);
            int destHeight = (int)(sourceHeight * nPercent);

            Bitmap bmPhoto = new Bitmap(Width, Height, PixelFormat.Format24bppRgb);
            bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);

            Graphics grPhoto = Graphics.FromImage(bmPhoto);
            grPhoto.Clear(Color.White);
            grPhoto.InterpolationMode = InterpolationMode.HighQualityBicubic;

            grPhoto.DrawImage(imgPhoto,
                new Rectangle(destX, destY, destWidth, destHeight),
                new Rectangle(sourceX, sourceY, sourceWidth, sourceHeight),
                GraphicsUnit.Pixel);

            grPhoto.Dispose();
            return bmPhoto;
        }       //ok

        public virtual Image Crop(Image imgPhoto, int Width, int Height, AnchorPosition Anchor)
        {
            int sourceWidth = imgPhoto.Width;
            int sourceHeight = imgPhoto.Height;
            int sourceX = 0;
            int sourceY = 0;
            int destX = 0;
            int destY = 0;

            float nPercent = 0;
            float nPercentW = 0;
            float nPercentH = 0;

            nPercentW = ((float)Width / (float)sourceWidth);
            nPercentH = ((float)Height / (float)sourceHeight);

            if (nPercentH < nPercentW)
            {
                nPercent = nPercentW;
                switch (Anchor)
                {
                    case AnchorPosition.Top:
                        destY = 0;
                        break;
                    case AnchorPosition.Bottom:
                        destY = (int)(Height - (sourceHeight * nPercent));
                        break;
                    default:
                        destY = (int)((Height - (sourceHeight * nPercent)) / 2);
                        break;
                }
            }
            else
            {
                nPercent = nPercentH;
                switch (Anchor)
                {
                    case AnchorPosition.Left:
                        destX = 0;
                        break;
                    case AnchorPosition.Right:
                        destX = (int)(Width - (sourceWidth * nPercent));
                        break;
                    default:
                        destX = (int)((Width - (sourceWidth * nPercent)) / 2);
                        break;
                }
            }

            int destWidth = (int)(sourceWidth * nPercent);
            int destHeight = (int)(sourceHeight * nPercent);

            Bitmap bmPhoto = new Bitmap(Width, Height, PixelFormat.Format24bppRgb);
            bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);

            Graphics grPhoto = Graphics.FromImage(bmPhoto);
            grPhoto.InterpolationMode = InterpolationMode.HighQualityBicubic;

            grPhoto.DrawImage(imgPhoto,
                new Rectangle(destX, destY, destWidth, destHeight),
                new Rectangle(sourceX, sourceY, sourceWidth, sourceHeight),
                GraphicsUnit.Pixel);

            grPhoto.Dispose();
            return bmPhoto;
        }

        public virtual System.Drawing.Image ImagesCopyRight(System.Drawing.Image imgPhoto, string Copyright)
        {
            //string WorkingDirectory = @"C:\Documents and Settings\sonnv\Desktop\test";

            //create a image object containing the photograph to watermark
            //System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(WorkingDirectory + "\\F15-Eagle3_1.jpg");
            int phWidth = imgPhoto.Width;
            int phHeight = imgPhoto.Height;

            //create a Bitmap the Size of the original photograph
            Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb);

            bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);

            //load the Bitmap into a Graphics object 
            Graphics grPhoto = Graphics.FromImage(bmPhoto);

            //create a image object containing the watermark
            //System.Drawing.Image imgWatermark = new Bitmap(WorkingDirectory + "\\untitled.bmp");
            //int wmWidth = imgWatermark.Width;
            //int wmHeight = imgWatermark.Height;

            //------------------------------------------------------------
            //Step #1 - Insert Copyright message
            //------------------------------------------------------------

            //Set the rendering quality for this Graphics object
            grPhoto.SmoothingMode = SmoothingMode.AntiAlias;

            //Draws the photo Image object at original size to the graphics object.
            grPhoto.DrawImage(
                imgPhoto,                               // Photo Image object
                new Rectangle(0, 0, phWidth, phHeight), // Rectangle structure
                0,                                      // x-coordinate of the portion of the source image to draw. 
                0,                                      // y-coordinate of the portion of the source image to draw. 
                phWidth,                                // Width of the portion of the source image to draw. 
                phHeight,                               // Height of the portion of the source image to draw. 
                GraphicsUnit.Pixel);                    // Units of measure 

            //-------------------------------------------------------
            //to maximize the size of the Copyright message we will 
            //test multiple Font sizes to determine the largest posible 
            //font we can use for the width of the Photograph
            //define an array of point sizes you would like to consider as possiblities
            //-------------------------------------------------------
            int[] sizes = new int[] { 16, 14, 12, 10, 8, 6, 4 };

            Font crFont = null;
            SizeF crSize = new SizeF();

            //Loop through the defined sizes checking the length of the Copyright string
            //If its length in pixles is less then the image width choose this Font size.
            for (int i = 0; i < 7; i++)
            {
                //set a Font object to Arial (i)pt, Bold
                crFont = new Font("tahoma", sizes[i], FontStyle.Bold);
                //Measure the Copyright string in this Font
                crSize = grPhoto.MeasureString(Copyright, crFont);

                if (((ushort)crSize.Width / 4) < (ushort)phWidth)
                    break;
            }

            //Since all photographs will have varying heights, determine a 
            //position 5% from the bottom of the image
            int yPixlesFromBottom = (int)(phHeight * .05);

            //Now that we have a point size use the Copyrights string height 
            //to determine a y-coordinate to draw the string of the photograph
            float yPosFromBottom = ((phHeight - yPixlesFromBottom) - (crSize.Height / 2));

            //Determine its x-coordinate by calculating the center of the width of the image
            float xCenterOfImg = (phWidth / 2);

            //Define the text layout by setting the text alignment to centered
            StringFormat StrFormat = new StringFormat();
            StrFormat.Alignment = StringAlignment.Far;

            //define a Brush which is semi trasparent black (Alpha set to 153)
            SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(153, 0, 0, 0));

            //Draw the Copyright string
            grPhoto.DrawString(Copyright,                 //string of text
                crFont,                                   //font
                semiTransBrush2,                           //Brush
                new PointF(xCenterOfImg + 1, yPosFromBottom + 1),  //Position
                StrFormat);

            //define a Brush which is semi trasparent white (Alpha set to 153)
            SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(153, 255, 255, 255));

            //Draw the Copyright string a second time to create a shadow effect
            //Make sure to move this text 1 pixel to the right and down 1 pixel
            grPhoto.DrawString(Copyright,                 //string of text
                crFont,                                   //font
                semiTransBrush,                           //Brush
                new PointF(xCenterOfImg, yPosFromBottom),  //Position
                StrFormat);                               //Text alignment

            return bmPhoto;
        }

        public virtual System.Drawing.Image ImagesWatermark(System.Drawing.Image imgPhoto, System.Drawing.Image imgWatermark)
        {
            //set a working directory
            //string WorkingDirectory = @"C:\Documents and Settings\sonnv\Desktop\test";

            //define a string of text to use as the Copyright message
            //string Copyright = "Copyright © 2010";

            //create a image object containing the photograph to watermark
            //System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(WorkingDirectory + "\\F15-Eagle3_1.jpg");
            int phWidth = imgPhoto.Width;
            int phHeight = imgPhoto.Height;

            //create a Bitmap the Size of the original photograph
            Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb);

            bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);

            //load the Bitmap into a Graphics object 
            Graphics grPhoto = Graphics.FromImage(bmPhoto);

            //create a image object containing the watermark
            //System.Drawing.Image imgWatermark = new Bitmap(WorkingDirectory + "\\untitled.bmp");
            int wmWidth = imgWatermark.Width;
            int wmHeight = imgWatermark.Height;

            //------------------------------------------------------------
            //Step #2 - Insert Watermark image
            //------------------------------------------------------------
            //Set the rendering quality for this Graphics object
            grPhoto.SmoothingMode = SmoothingMode.AntiAlias;

            //Draws the photo Image object at original size to the graphics object.
            grPhoto.DrawImage(
                imgPhoto,                               // Photo Image object
                new Rectangle(0, 0, phWidth, phHeight), // Rectangle structure
                0,                                      // x-coordinate of the portion of the source image to draw. 
                0,                                      // y-coordinate of the portion of the source image to draw. 
                phWidth,                                // Width of the portion of the source image to draw. 
                phHeight,                               // Height of the portion of the source image to draw. 
                GraphicsUnit.Pixel);                    // Units of measure 


            //Create a Bitmap based on the previously modified photograph Bitmap
            Bitmap bmWatermark = new Bitmap(bmPhoto);
            bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
            //Load this Bitmap into a new Graphic Object
            Graphics grWatermark = Graphics.FromImage(bmWatermark);

            //To achieve a transulcent watermark we will apply (2) color 
            //manipulations by defineing a ImageAttributes object and 
            //seting (2) of its properties.
            ImageAttributes imageAttributes = new ImageAttributes();

            //The first step in manipulating the watermark image is to replace 
            //the background color with one that is trasparent (Alpha=0, R=0, G=0, B=0)
            //to do this we will use a Colormap and use this to define a RemapTable
            ColorMap colorMap = new ColorMap();

            //My watermark was defined with a background of 100% Green this will
            //be the color we search for and replace with transparency
            colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
            colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);

            ColorMap[] remapTable = { colorMap };

            imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);

            //The second color manipulation is used to change the opacity of the 
            //watermark.  This is done by applying a 5x5 matrix that contains the 
            //coordinates for the RGBA space.  By setting the 3rd row and 3rd column 
            //to 0.3f we achive a level of opacity
            float[][] colorMatrixElements = { 
                                                new float[] {1.0f,  0.0f,  0.0f,  0.0f, 0.0f},       
                                                new float[] {0.0f,  1.0f,  0.0f,  0.0f, 0.0f},        
                                                new float[] {0.0f,  0.0f,  1.0f,  0.0f, 0.0f},        
                                                new float[] {0.0f,  0.0f,  0.0f,  0.3f, 0.0f},        
                                                new float[] {0.0f,  0.0f,  0.0f,  0.0f, 1.0f}};
            ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);

            imageAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default,
                ColorAdjustType.Bitmap);

            //For this example we will place the watermark in the upper right
            //hand corner of the photograph. offset down 10 pixels and to the 
            //left 10 pixles

            int xPosOfWm = ((phWidth - wmWidth) - 10);
            int yPosOfWm = ((phHeight-wmHeight)-10);

            grWatermark.DrawImage(imgWatermark,
                new Rectangle(xPosOfWm, yPosOfWm, wmWidth, wmHeight),  //Set the detination Position
                0,                  // x-coordinate of the portion of the source image to draw. 
                0,                  // y-coordinate of the portion of the source image to draw. 
                wmWidth,            // Watermark Width
                wmHeight,		    // Watermark Height
                GraphicsUnit.Pixel, // Unit of measurment
                imageAttributes);   //ImageAttributes Object


            //Replace the original photgraphs bitmap with the new Bitmap
            imgPhoto = bmWatermark;
            grPhoto.Dispose();
            grWatermark.Dispose();

            return bmWatermark;

            //save new image to file system.
            //imgPhoto.Save(WorkingDirectory + "\\watermark_final.jpg", ImageFormat.Jpeg);
            //imgPhoto.Dispose();
            //imgWatermark.Dispose();
        }

        public virtual System.Drawing.Image ImagesCopyrightAndWatermark(System.Drawing.Image imgPhoto, string Copyright, System.Drawing.Image imgWatermark)
        {
            //string WorkingDirectory = @"C:\Documents and Settings\sonnv\Desktop\test";

            //create a image object containing the photograph to watermark
            //System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(WorkingDirectory + "\\F15-Eagle3_1.jpg");
            int phWidth = imgPhoto.Width;
            int phHeight = imgPhoto.Height;

            //create a Bitmap the Size of the original photograph
            Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb);

            bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);

            //load the Bitmap into a Graphics object 
            Graphics grPhoto = Graphics.FromImage(bmPhoto);

            //create a image object containing the watermark
            //System.Drawing.Image imgWatermark = new Bitmap(WorkingDirectory + "\\untitled.bmp");
            int wmWidth = imgWatermark.Width;
            int wmHeight = imgWatermark.Height;

            //------------------------------------------------------------
            //Step #1 - Insert Copyright message
            //------------------------------------------------------------

            //Set the rendering quality for this Graphics object
            grPhoto.SmoothingMode = SmoothingMode.AntiAlias;

            //Draws the photo Image object at original size to the graphics object.
            grPhoto.DrawImage(
                imgPhoto,                               // Photo Image object
                new Rectangle(0, 0, phWidth, phHeight), // Rectangle structure
                0,                                      // x-coordinate of the portion of the source image to draw. 
                0,                                      // y-coordinate of the portion of the source image to draw. 
                phWidth,                                // Width of the portion of the source image to draw. 
                phHeight,                               // Height of the portion of the source image to draw. 
                GraphicsUnit.Pixel);                    // Units of measure 

            //-------------------------------------------------------
            //to maximize the size of the Copyright message we will 
            //test multiple Font sizes to determine the largest posible 
            //font we can use for the width of the Photograph
            //define an array of point sizes you would like to consider as possiblities
            //-------------------------------------------------------
            int[] sizes = new int[] { 16, 14, 12, 10, 8, 6, 4 };

            Font crFont = null;
            SizeF crSize = new SizeF();

            //Loop through the defined sizes checking the length of the Copyright string
            //If its length in pixles is less then the image width choose this Font size.
            for (int i = 0; i < 7; i++)
            {
                //set a Font object to Arial (i)pt, Bold
                crFont = new Font("tahoma", sizes[i], FontStyle.Italic);
                //Measure the Copyright string in this Font
                crSize = grPhoto.MeasureString(Copyright, crFont);

                if (((ushort)crSize.Width / 4) < (ushort)phWidth)
                    break;
            }

            //Since all photographs will have varying heights, determine a 
            //position 5% from the bottom of the image
            int yPixlesFromBottom = (int)(phHeight * .05);

            //Now that we have a point size use the Copyrights string height 
            //to determine a y-coordinate to draw the string of the photograph
            float yPosFromBottom = ((phHeight - yPixlesFromBottom) - (crSize.Height / 2));

            //Determine its x-coordinate by calculating the center of the width of the image
            float xCenterOfImg = (phWidth / 2);

            //Define the text layout by setting the text alignment to centered
            StringFormat StrFormat = new StringFormat();
            StrFormat.Alignment = StringAlignment.Center;

            //define a Brush which is semi trasparent black (Alpha set to 153)
            SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(153, 0, 0, 0));

            //Draw the Copyright string
            grPhoto.DrawString(Copyright,                 //string of text
                crFont,                                   //font
                semiTransBrush2,                           //Brush
                new PointF(xCenterOfImg + 1, yPosFromBottom + 1),  //Position
                StrFormat);

            //define a Brush which is semi trasparent white (Alpha set to 153)
            SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(153, 255, 255, 255));

            //Draw the Copyright string a second time to create a shadow effect
            //Make sure to move this text 1 pixel to the right and down 1 pixel
            grPhoto.DrawString(Copyright,                 //string of text
                crFont,                                   //font
                semiTransBrush,                           //Brush
                new PointF(xCenterOfImg, yPosFromBottom),  //Position
                StrFormat);

            //------------------------------------------------------------
            //Step #2 - Insert Watermark image
            //------------------------------------------------------------

            //Create a Bitmap based on the previously modified photograph Bitmap
            Bitmap bmWatermark = new Bitmap(bmPhoto);
            bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
            //Load this Bitmap into a new Graphic Object
            Graphics grWatermark = Graphics.FromImage(bmWatermark);

            //To achieve a transulcent watermark we will apply (2) color 
            //manipulations by defineing a ImageAttributes object and 
            //seting (2) of its properties.
            ImageAttributes imageAttributes = new ImageAttributes();

            //The first step in manipulating the watermark image is to replace 
            //the background color with one that is trasparent (Alpha=0, R=0, G=0, B=0)
            //to do this we will use a Colormap and use this to define a RemapTable
            ColorMap colorMap = new ColorMap();

            //My watermark was defined with a background of 100% Green this will
            //be the color we search for and replace with transparency
            colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
            colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);

            ColorMap[] remapTable = { colorMap };

            imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);

            //The second color manipulation is used to change the opacity of the 
            //watermark.  This is done by applying a 5x5 matrix that contains the 
            //coordinates for the RGBA space.  By setting the 3rd row and 3rd column 
            //to 0.3f we achive a level of opacity
            float[][] colorMatrixElements = { 
                                                new float[] {1.0f,  0.0f,  0.0f,  0.0f, 0.0f},       
                                                new float[] {0.0f,  1.0f,  0.0f,  0.0f, 0.0f},        
                                                new float[] {0.0f,  0.0f,  1.0f,  0.0f, 0.0f},        
                                                new float[] {0.0f,  0.0f,  0.0f,  0.3f, 0.0f},        
                                                new float[] {0.0f,  0.0f,  0.0f,  0.0f, 1.0f}};
            ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);

            imageAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default,
                ColorAdjustType.Bitmap);

            //For this example we will place the watermark in the upper right
            //hand corner of the photograph. offset down 10 pixels and to the 
            //left 10 pixles

            int xPosOfWm = ((phWidth - wmWidth) - 10);
            int yPosOfWm = 10;

            grWatermark.DrawImage(imgWatermark,
                new Rectangle(xPosOfWm, yPosOfWm, wmWidth, wmHeight),  //Set the detination Position
                0,                  // x-coordinate of the portion of the source image to draw. 
                0,                  // y-coordinate of the portion of the source image to draw. 
                wmWidth,            // Watermark Width
                wmHeight,		    // Watermark Height
                GraphicsUnit.Pixel, // Unit of measurment
                imageAttributes);   //ImageAttributes Object

            //Replace the original photgraphs bitmap with the new Bitmap
            imgPhoto = bmWatermark;
            grPhoto.Dispose();
            grWatermark.Dispose();

            return bmWatermark;

        }
    }
}
